<html>
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        s {
            color: rgb(20, 179, 235);
        }
    </style>
</head>
<body>
    <button class="1anniu">
        <h1>按钮</h1>
    </button>
</body>
<script src="./jquery1.js"></script>
<script>
    $(".1anniu").css({
        "background": "rgb(19, 174, 233)",
        "width": "70px",
        "height": "40px",
        "font-size": "7px",
        "color": "white",
        "border": "0",
    })
</script>
</html>